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published by the National Physical Laboratory
This resource is an informative and entertaining fact sheet on the history of the kilogram, the SI unit for measuring mass. It is the last remaining base unit to be defined as a "physical object". Often, it is difficult for beginning students to understand the kilogram in terms of a fundamental constant. This site discusses the 100-year quest to find a consistent system for measuring mass, introduces users to the electrical kilogram, and provides a link to a cost-free poster on mass.

The NPL is the UK's national measurement institute, established in 1900 to develop and apply accurate measurement standards for science and technology.
Subjects Levels Resource Types
General Physics
- Measurement/Units
= Units and Dimensional Analysis
- High School
- Middle School
- Lower Undergraduate
- Instructional Material
= Tutorial
- Reference Material
= Nonfiction Reference
- Audio/Visual
= Illustration
Appropriate Courses Categories Ratings
- Physical Science
- Physics First
- Conceptual Physics
- Algebra-based Physics
- AP Physics
- Activity
- New teachers
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Intended Users:
Learner
Educator
General Public
Formats:
text/html
application/pdf
Access Rights:
Free access
Restriction:
© 2011 National Physical Laboratory, http://www.npl.co.uk/category/235
Keywords:
SI units, base unit, kilogram, mass, measurement, physical quantities
Record Cloner:
Metadata instance created February 23, 2011 by Caroline Hall
Record Updated:
July 19, 2011 by Lyle Barbato
Last Update
when Cataloged:
January 31, 2011
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
(National Physical Laboratory, Middlesex, 2011), WWW Document, (http://www.npl.co.uk/educate-explore/posters/mass/).
AJP/PRST-PER
National Physical Laboratory Factsheets: Mass (National Physical Laboratory, Middlesex, 2011), <http://www.npl.co.uk/educate-explore/posters/mass/>.
APA Format
National Physical Laboratory Factsheets: Mass. (2011, January 31). Retrieved July 22, 2014, from National Physical Laboratory: http://www.npl.co.uk/educate-explore/posters/mass/
Chicago Format
National Physical Laboratory. National Physical Laboratory Factsheets: Mass. Middlesex: National Physical Laboratory, January 31, 2011. http://www.npl.co.uk/educate-explore/posters/mass/ (accessed 22 July 2014).
MLA Format
National Physical Laboratory Factsheets: Mass. Middlesex: National Physical Laboratory, 2011. 31 Jan. 2011. 22 July 2014 <http://www.npl.co.uk/educate-explore/posters/mass/>.
BibTeX Export Format
@misc{ Title = {National Physical Laboratory Factsheets: Mass}, Publisher = {National Physical Laboratory}, Volume = {2014}, Number = {22 July 2014}, Month = {January 31, 2011}, Year = {2011} }
Refer Export Format

%T National Physical Laboratory Factsheets: Mass
%D January 31, 2011
%I National Physical Laboratory
%C Middlesex
%U http://www.npl.co.uk/educate-explore/posters/mass/
%O text/html

EndNote Export Format

%0 Electronic Source
%D January 31, 2011
%T National Physical Laboratory Factsheets: Mass
%I National Physical Laboratory
%V 2014
%N 22 July 2014
%8 January 31, 2011
%9 text/html
%U http://www.npl.co.uk/educate-explore/posters/mass/


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